It's good that they both have lines with good hips & elbows. However, with a breed like this, it is absolutely worth it to test! =) No need to rush things, you can spend the next 2 years working on YOUR relationship with your dogs, it sounds like you're already consumed with that. I feel ya, my Border Collie can get very jealous & snarky with our new puppy. I second the recommendation to seperate them when they aren't supervised, and give each dog individual attention. You and your hubby have to be the alphas, and lay down the laws strictly, to have happy & obedient dogs.
I'm very happy that you are open-minded about this. I'm sorry, but it did sound like, in your first post, you just wanted to breed regardless of health, performance, etc. On the internet, it's very hard to understand one's intentions of breeding in just a short post (especially with the prices. In the "rules of a BYB", posting prices before the puppies are born is one of the basic expectations! LOL! You should evaluate each puppy individually when they are about 6 weeks old, most definitely search for a professional opinion on what dogs have good structure for sporting & hunting, conformation, pet, etc). Seriously though, you will get MUCH better homes & owners, and a greater compensation (money-wise) for your effort if you wait to completely health test both parents, train both parents to be very well-mannered and obedient, and pursue sporting with both parents. Not to mention, won't you have a much clearer conscience if you KNOW your dogs are healthy and have excellent hunting & retrieving skills, instead of just HOPING and assuming they do? I do commend you for coming here, and for NOT breeding your Labs with Standard Poodles, or any other breed of dog! ;P
I hope you stick around, show us more of your beautiful pups, and seek as well as input training advice. Dock diving is amazing, and Labs are great at it, if you were considering "diving in" to sporting with that. There are competitions for dock diving around the country, I've even taken my Border Collie to an event!